Preliminary experiment on compatibility of SiCf/SiC composites in static liquid LiPb at 700 °C

Abstract SiC f /SiC composite is considered as one of the most promising structural material candidates for fusion reactors. Its corrosion behavior in liquid LiPb at high temperature needs to be investigated in details. A capsule named DRAGON-ST was designed and built for static corrosion experiment at 700 °C as a first step in order to evaluate the corrosion behavior of homebred SiC f /SiC composite with LiPb, it was characterized by weight change and observation of corroded surfaces. The results after 500 h experiment showed that the 3D SiC f /SiC composite with CVD (chemical vapor deposition)–SiC coating was stable in the liquid LiPb, most area of the composites surface and the matrix remained well. Further study needs to be carried out to evaluate the compatibility of SiC f /SiC composites with LiPb completely.